As the supply of new, unique IPv4 addresses dwindles, some enterprises and service providers will use traditional NAT （network address translation） to conserve the addresses they already have.

随着新的、唯一的IPv4地址供应数量的下降，一些企业和服务提供商使用传统的NAT（网络地址转换）技术作为保持现有地址的措施。

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Andrews Square, senior managers sweated the details in marathon sessions, telling Goodwin that he had no choice but to drop RBS' smaller, simpler IT system into the Nat West's giant network--that was the way big IT mergers were done.

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However, ISPs have so widely deployed network address translation (NAT) devices, which coordinate multiple intranet addresses through a single Internet address, that they're in no hurry to move to IPv6.

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There are a variety of problems associated with masking IPv4 address space behind network address translation technologies, especially Large Scale NAT (LSN) or Carrier Grade NAT (CGN).

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